If complex numbers $(x - 2y) + i(3x - y)$ and $(2x - y) + i(x - y + 6)$ are conjugates of each other,then $|x + iy|$ is $(x, y \in \mathbb{R})$.

  • A
    $1$
  • B
    $\sqrt{2}$
  • C
    $2$
  • D
    $4$

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